Stop-door-hinge fixture



Oct. 11, 1927.

w. H. PAcKl-:R

STOP DOOR HINGE FIXTURE Filed Jan. 21. 1925 2 Sheets-Sheet 2 ,MNARAF Glimmen,

CJI

Patented Oct. 11, 1927. t

narran srATns WILLIAM I-I. PACKER, OF COLUMBUS, OHIO.

STOP-DOOR-IIINGE FIXTURE.

Application led January This. invention relates to stop door hinge fixtures, and has for its object the provision ot a novel and improved spring actuated hinge xture by means of which an associated stop door will be positively maintained in both its open and closed positions.

In the majority of spring actuated stove doors now in commercial use., it is customary to arrange the springs so that they will act upon thedoor to maintain the latter normally in a` closed position. Vilienever the door is opened or partially opened the tendency of the springs` associated therewith is to force the door closed. This construction is objectionable in several*- iespects, but one of the principal objections thereto is the necessity of applying force to keep the door open while the attendant is placing materials into or removing the same from the compartment of a stove closed by the door, since unless this pressure is applied to the door when open, the tendency of the same will be to swing about its pivot to a closed position with the likelihood of touching and burning the arms of the attendant. Because of this condition the present invention provides an improved and simplified type of spring hinge structure for stove doors which will automatically maintain itself in both open and closed positions and further, to construct the fixture so that the door may be opened and closed .quickly and conveniently.

hinge iixtures associated therewith,

IFigureS is a vertical longitudinal sectional view taken on the line 3-3 of Figure 2, and

`illustrating the position of the springhinge fixture when the door occupies a closed position,

Figure t isa similar view illustrating the door vwhen in its open position,

Figure '5 is a detail perspective view of the fixture removed from the stove, and

21, 1925.` Serial No. 3,837.

Figure 6 is a vertical sec-tional view showing a modified form of fixture.

Referring to the drawing the numeral 10 .designates the oven casing of a stove or cool:- ing range, although it will be apparent that in its scope the invention is not limited to oven or stove doors but may -iind use in connection with any type of swinging closure generally. For present purposes, however, the disclosure will be directed specifically to the use of the invention in connection with an ordinary form of domestic cooking range.

Constituting a kpart ofthe casing l() is a channel door frame 11 which in this instance surrounds the opening 12 of an oven or other similar 'compartment 13 of the stove or range. A. portion of the frame adjacent tothe bottom of the compartment 13, is formed' on the opposite sides thereof with slots 1li, and the lower ends of these slots constitute fulcrum edges which are designated by the numeral 15. Arranged within the channel portions of the door fra-me 11 on opposite sides of the opening` 12 is a pair of base plates 176. rlhese plates are formed with slots 17 which register with the slots 1 4, and arranged.y to pass through the slots 14 and 17 is a pair of fulcrumed door supporting arms 18. The outer ends of the arms 18 terminate in brackets 19 which are secured as at 2O to cooperative brackets 21 provided in connection with the lower corners of an oven door 22. By this construction the door is supported by lthe brackets 19 and by bei-,ng thus supported will fulcrum around the edges15 when the door is being moved from open to closed positions.

The arms 18, as shown in Figure 3, extend downwardly and angularly and are provided with curved edges 23 which engage with the fulcrum edges 15 to pivotally support the door 22. The extreme lower ends of the arms 18 terminate in hook extensions, each of which includes a :toot 24 and a curved rod receiving surface- 25.

Cooperative with the .surface 25 yand adapted to ride thereupon is the lower bifurcatedend 26 cfa spring rodv 27, one-of which is provided in; connection with each oit' the arms 1S. TheseV rods extend upwardly and have their upper endsslidablyl and loosely received within slotsi28 provided in connection with out-turned spring seats 29Aformed with the upper endsuofthe base plate 16. The rods 27 are. tormedwth. transverse. pins 30, upon which seatt-le lower ends-of expan- Il iV sion coil springs 3l, the upper ends of said springs being engaged with the seats 29.

l sition acutely angular to the vertical plane of the door frame ll, the closing of theV door, and thefconsequent movement of the armsl8, causes the cam surfaces thereof 32 to wipe against the lower ends of said rods so that such ends will be forced upwardly to assume the angular' position shown in Figure 3. llhen in this posit-ion the coil lsprings 3l are positioned so that the same may exercise their greatest effort upon the arms 18 byA reason of the increased leverage obtained by the peculiar configuration of the arms 18. ln other words the force exercised bythe springs is applied to the outermost point Vof the arms 18 with respect to the fulcruni edges 15. Now, as the door is,l swung to assume the open position depicted in Figure l the footV extensions 2d provided on the extreme outer ends of the Varms VlS-then engage with the lower por-v tions of the rods 27 and also, byreason of the engagement of the bifurcated ends 26 of the rods Vwith the curved edges V25 of the arms 1S, the said rods will be elevated placing the springs 31 under tension. The engagement between the foot extensions 24 of the arms'lS and the rods 27 results in rocking'theV rods inwardly, causing the saine to ride upon the edgesl 25 until said rods assume a position wherein the weight of the door and due to the shifting of the rodsnear the fulcrum edges,the saine will overcome the influence of the compressed springs 31 and thus maintain the doo-r in an open position,

thereby holding the door Vopen until positive pressure is appliedto swing the Vsaine to its closed position. ln the modified form of the invention set forth in Figure the same` spring pressures areV applied tothe `arms 18, but in lieu'of the coilf springs 3l l employ flat bow or leaf springs 38. lt will be-ob served that the base plates 16 vare maintained in their fixed positions by means o f the arms 18, which pass through slots provided in said plates. This avoids the necessity of rigidly mounting theV plates on the door frames, eliminates Vwelding or fastening appliances, and` furthermore enables the entire fixture to be assembled outside of the stove and .then applied thereto 1in assembled form, and convenienceand' economy iin y the j 'manufacture of the stovethereby"resulting;V

closures comprisingvan arm projecting in- Y, wardly and" rigidly from-the swinging yelo sure, a frame upon which the lower edge of said arm is fulcrumed, a cam edge formed upon the opposite edge' of said arm with respectto the fulcrum edge, and spring means cooperative with the cam edge of said arm `rest upon the lower portions of said openings for pivotal movement, the portions of said extensions lying within said door frame being formed to include opposed cam Y surfaces, and spring means cooperative with said extensions for applying spring pressure thereto between said cam surfaces, said Cain surfaces voperating to shift the operating positions Vof said spring means so as to neutra-l- Vize the pressure thereof, whereby the door will be held in either its open or closed positions. Y v

3. A `hinge fixture for doors comprising angularly and inwardly directed projections or extensions projecting rigidly from the hinged edge of a door, said extensions being adaptedV to project through openings provided in'a cooperative door frame, the extensions engaging Vwith and being fulcrumed upon certain of the-walls of said openings, said extensions within said frame being provided With a, cam surface, spring means engaging with said cam surface and movable with respect thereto, and opposed operating projections provided upon said extensions at the terminating points of said cam surface and cooperative with said spring means when the door is operated tov cause said spring means to assume positions with respect to said cam surface lto neutralize the pressure thereof and maintain the door norlmally in either of its open or closed positions.

` 4. Ahinge'iixture for swinging doors coinprising a bracket adapted to be secured to the hinged edge of a door,1said;,braclret `being formed to include an inwardly and angularly directed extension arranged to pass through and to be fulcrumed upon an opening providedin an associated door, frame, one edge of saidextension being formed with a cani surface, aspring pressure rod arranged for sliding engagement with said cam surface and projections provided upon Vsaid extension at the terminating portions of said cam Vsurface and adapted for engagement with said rod'so as to shift the latter with respect to said surface to Voccupy positions neutralizing Vthe pressure thereof, thereby maintaining said .door iii-,either of its opened or. closedpositions.

lilll i is ist

In a stove, a door provided at its hinged edge with an inwardly extending arm, said arm being arranged to pass through a slot provided in the door frame, a cam surface provided upon the portion of said arm lying Within said frame, a base plate having a slot formed therein for the reception of said arm and arranged Within said frame, a rod having the lower end thereof slidably engaged with said cam surface and the upper end thereof provided loosely Within an opening formed in the upper end of said plate, a coil spring disposed around said rod and contracted between said base plate and a fixed projection formed on said rod, and projections provided upon sa-id arm at the ends of said cam surface and cooperating with said rod to shift the latter automatically into engag'ement with different portions of said cam surface.

6. In a stove, a door provided With inwardly directed arms, said arms being fulcruined Within openings provided in the door frame, cam surfaces provided upon said arms Within said frame, spring means oooperative with said arms and slidably en-k gaged with said cam surfaces, and means provided in connection with said arms for shifting automatically the positions of engagement between said spring means and said cam surfaces.

In testimony whereof 1I affix my signature.

WILLIAM H. PACKER.y 

